Knights of Frontier Valley, the challenging, deeply immersive roguelike RPG, isn’t just a love letter to the golden age of role-playing games-it’s a feat of solo development. In a brand-new developer blog, creator Martin Menzel reveals how he spent years building his own custom engine to bring the Valley to life - including low-level plumbing work like memory management and rendering, but also features like pathfinding, adaptive game time, weather modeling, and much more.